Nothing would prevent him from speaking out against injustice.
什么都不能阻止他鸣不平。
Nothing would prevent him/his speaking out against injustice.
老师,省略了from有什么不同?
下面两个结构都可 以用(没有区别):
prevent sb (from) doing sth (from可用也可不用)
prevent sb's doing sth (不能用from)
所以你的句子:
正:Nothing would prevent him from speaking out against injustice.
正:Nothing would prevent him speaking out against injustice.
正:Nothing would prevent his speaking out against injustice.
误:Nothing would prevent from his speaking out against injustice.